55 lines
1.4 KiB
Python
55 lines
1.4 KiB
Python
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# -*- coding: utf-8 -*-
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# This file is part of pygal
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#
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# A python svg graph plotting library
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# Copyright © 2012-2016 Kozea
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#
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# This library is free software: you can redistribute it and/or modify it under
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# the terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 3 of the License, or (at your option) any
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# later version.
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#
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# This library is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with pygal. If not, see <http://www.gnu.org/licenses/>.
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"""Value adapters to use when a chart doesn't accept all value types"""
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from decimal import Decimal
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from pygal._compat import is_str
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def positive(x):
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"""Return zero if value is negative"""
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if x is None:
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return
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if is_str(x):
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return x
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if x < 0:
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return 0
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return x
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def not_zero(x):
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"""Return None if value is zero"""
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if x == 0:
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return
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return x
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def none_to_zero(x):
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"""Return 0 if value is None"""
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if x is None:
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return 0
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return x
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def decimal_to_float(x):
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"""Cast Decimal values to float"""
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if isinstance(x, Decimal):
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return float(x)
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return x
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